Few countries on earth have had some a terrible record for killing and violently abusing its citizens as Guatemala. The rule of law there is so shaky an international tribunal under the UN has been called in to prosecute national-scale criminals. Film-maker Pamela Yates has helped uncover the crimes, even helped convict the former President Gen. Efrain Rios Montt. Her documentaries When the Mountains Treble and Granito: How to Nail a Dictator have won many awards and her new film 500 Years opens this week.